Radio-spectrum evolution of young shell supernova remnants (SNR)

Details Radio-spectrum evolution of young shell supernova remnants (SNR) Radio-spectrum evolution of young shell supernova remnants (SNR)

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pazh...11..825g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 11, Nov. 1985, p. 825-831) Soviet Astronomy Letters (ISSN 0360-0327), vol. 11, Nov.-Dec

Astronomy and Astrophysics

Astronomy

Radio Spectra, Stellar Envelopes, Stellar Evolution, Supernova Remnants, Electron Acceleration, Milky Way Galaxy, Molecular Clouds, Radiant Flux Density, Relativistic Particles, Stellar Models, Temporal Distribution

Scientific paper

The dependence of the radio spectral index α on diameter and age is discovered for all galactic young (<1800 yr) shell supernova remnants (SNRs) on the basis of data for these SNRs. It is shown that the empirical evolution of α is satisfactorily described by Cowsik's (1979) model of the second-order Fermi acceleration mechanism acting on electrons injected at the moment of supernova outburst. The agreement with Cowsik's model confirms that young shell SNRs and probably many other shell SNRs must not contain injections of relativistic particles such as pulsars inside plerions.

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